These first measurements of the nonlinear optical properties of fluorides (BaMgF4 and BaZnF4) show these air-stable compounds to be noncritically phase matchable at room temperature for a 1.06-μ pump. The highly ionic compounds are also quite resistant to optical damage (∼109 W/cm2). The materials should find applications as frequency doublers in cases where spatial power distribution makes crystals with walk off less desirable and/or cases where high pump powers require crystals which are resistent to damage.
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Bergman et al. (1975) studied this question.
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